<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="root"></div>
    <script src="./vue3基础源码/vue3.js"></script>
    <script>
        const app = Vue.createApp({
            data(){
                return {name:"zhang",age:"19"}
            },
            rules:{
                age:{
                    abc:age => age >= 25,
                    mess:"too young"
                },
                name:{
                    abc:name => name.length >= 4,
                    mess:"too short"
                }
            },
            template:`<div>{{name}}-------{{age}}</div>`
        });

        app.mixin({
            created(){
                console.log(this.$options.rules);
                for(let key in this.$options.rules) {
                    const item = this.$options.rules[key];
                    this.$watch(key,value=>{
                       let result =  item.abc(value);
                       if(!result) console.log(item.mess);
                    })
                }
            }
        })


       const vm = app.mount("#root");
    </script>
</body>
</html>